Sash lock



Oct. 20, 1931. I PEKAR 1,828,439

SASH LOCK Filed 001;. '7, 1930 g jcb r 6 7 IN V EN TOR. Baa? Q/faz;

Fatented Oct. 20, 193i PATENT OFFICE FRANK PEKAR, or 'BRIDGEPORT, CONNECTICUT SASH LOCK Application filed October 7,1930. Serial No. 487,065. f

This invention relates to latches and has special reference to a sash latch which is preferably termed a burglar proof safety lock and anti-rattling device.

/ More particularly the invention relates to improvements in my prior Patent Number 1,661,634 of March 6,1928 and in the latch shown and described in my copending application [filed June 4:, 1929, Serial Number One important object of the invention is to improve the general construction of the latches of said patent and application.

A second important object of the invention is to provide an improved spring arrange inent in such latches;

A third important object of the invention 1s to provide improved means for holding the latchingmember proper or pawl in circulated positionl With the above and other objects in view as will be hereinafter apparent, the invention consists in general of certain novel details of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings and specifically claimed.

In the accompanying drawings like characters of reference indicate like parts in the several views, and

Figure 1 is a section through the meeting rail portions of a pair of window sash showing the improved latch in side elevation.

Figure 2 is an enlarged side elevation of -the latch showing the pawl in raised position.

Figure 3 is a plan view on the scale of Figure 2 but with the pawl dropped.

Figure 4; is a section on the line 4-4 of Figure, 3.

Figure 5 is a section on the line 5-5 of Figure 4:.

Figure 6 is a reduced bottom plan view of this form of the device.

Figure 7 is a bottom plan view of a slight- -ly modified form.

Figure 8 is a partial side elevation of this modified form.

The present invention consists of a housing U-shaped in cross-section and formed from a single piece of metal, thus having a an inverted U'shaped member 13 having a tail 14: which projects rearwardly from bein tween the side Walls 11. i1 rubber friction member 15 is held by compression between the sides of the member 13 at the forward end thereof and project slightly in front thereof. Grooves 16 are pressed into the sides of the member 13 to form stops against which the rear end of the member 15 rests. Also, the top of the member 13 is cut away so that the upper forward corners of the sides project to form prongs 17.

Wound around the pin 12 is a coiled torsion spring 18 which has one end extended rearwardly as at 19 to engage in" a notch 20 in one side'of the pawl." The other end of the coil 18 is extended downwardly at 21 and then bent upwardly at 22 at an acute angle to the part 21, this angle engaging in an opening 23 in the bottom 10 so that the spring is thus held under tension and constantly urges the pawl forwardly and downwardly. The spring is extended-from the upper end of the part 22 in a laterally horizontal direction as at 23 to pass out of a slot 24 formed in one side. The projecting end of thespring is coiled to form a convenient finger grip. In one side of the pawl is formed a cam notch 25 into which the spring part 23 slips upon the pawl being raised as in F igure 4. Y r There has been illustrated two means by which the housing may be attached to the meeting rail of a sash 26 so that the pawl may engage the upper sash 27 on its side rail. In Figure 6 the bottom 10 is shown as provided with a key hole opening 28 and a small opening 29 at the rear. In this case a round head screw is inserted in the sashand the device placed so that the screw head passes through the large end of the key hole key hole opening anda small screw inserted through the opening 29 to hold itinposition.

In the form shown in Figures 7 and 8 ears 30 are cut from the sides 11 and bent to job lie horizontally, these ears being provided with screw openings 31 so that the device may be screwed to the rail.

7 In use, if it is desired to release the pawl for movement of the sash it is merely necessary to depress the tail 14 until the spring end 23 snaps into the notch 25 which will hold the pawl raised. To release the pawl for locking the projecting end of the part 23 is pulled rearwardly to draw the part out of the notch whereupon the spring forces the pawl into engagement with the upper sash 27.

There has thus been provided a simple and eflicient device of the kind described and for the purpose specified.

It is obvious that minor changes may be made in the form and construction of the invention without departing from the ma Qterial'sp'irit thereof. It is not, therefore, desired to confine the invention to the exact form herein shown and described, but it is desired to include all such as properly come within the scope claimed.

Having thus described the invention, what is claimed as new is:

1. In a sash latch, a U-shaped housing having a bottom and sides, a pivot pin extending between the sides of said housing, a pawl 9 pivotally mounted on-said pin, said housing having means for mounting on av window sash, said pawl projecting forwardly to engage a relatively fixed object adjacent the sash, a spring surrounding said pin and having one end engaging said pawl, one side of the housing having a slot therein, said spring having its other end projecting through said slot and extending horizontally within the housing, and means on the pawl releasably engaged by the last mentioned end of the spring upon the front end of the pawl being raised.

2. In a sash latch, a U-shaped housing having a bottom and sides, a pivot pin extending 1between the sides of said housing, apawl pivotally mounted on said pin, said housing having means for mounting on a window sash, said pawl projecting forwardly to engage a relatively fixed object adjacent the sash, a spring surrounding said pin and having one end engaging said pawl, one side of the housing having a slot therein, said spring having its other end projecting through said slot and extending horizontally within the housing, said last end of the spring extending downwardly and then upwardly at an acute angle to the body of the spring, said housing having an opening in its bottom to receive the angular band of the spring, and V means on the pawl releasably engaged by the 45 between the sides of said housing, a pawl pivotally mounted on said pin, said housing having means for mounting on a window sash, said pawl projectin forwardly to engage a relatively fixed o bject adjacent the sash, a spring surrounding said pin and having one end engaging said pawl, one side of the housing having a slot therein, said spring having its other end projecting through said slot and extending horizontally within the housing, means on the pawl releasably engaged by the last mentioned end of the spring upon the front end of the pawl being raised, and a tail on said pawl projecting rearwardly from the housing for depression to raise the forward end of the pawl.

4:. In a sash latch, a U-shaped housing having a bottom and sides, a pivot pin extending bet-ween the sides of said housing, a pawl pivotally mounted on said pin, said housing having means for mounting on a window sash, said pawl. projecting forwardly to engage a relatively fixed object adjacent the sash, a spring surrounding said pin and having one end engaging said pawl, one side of the housing having a slot therein, said spring having its other end projecting through said slot and extending horizontally within the housing, said last end of the spring extending downwardly and then upwardly at an acute angle to the body of the spring, said housing having an opening in its bottom to receive the angular band of the spring, means on the pawl releasably engaged by the last mentioned end of the spring upon the front end of the pawl being raised, and a tail on said pawl projecting rearwardly from theihousing for depression to raise the forward end of the pawl.

In testimony whereof I aflix my signature.

FRANK PEKAR. 

